1 "I learned a new word at school today," said Julie.2 "What?" asked Sammy.3 "Invertebrate!" shouted Julie.4 "Inverte. . . what?" asked Sammy.5 "Invertebrate!" shouted Julie.6 "I have never heard that word before. What does it mean?" Sammy asked.7 "An invertebrate is an animal without a backbone," said Julie.8 "Really? So what does that mean?" asked Sammy.